Infants in neonatal intensive care units are increasing exposed to non-invasive ventilatory support modes (nasal continuous positive airway pressure - NCPAP and high flow nasal cannula: >1 L/min flow - HFNC). While there have been small descriptive studies of noise exposure in infants on NCPAP, there have been no comparative trials done comparing noise exposure in infants undergoing both NCPAP and HFNC.